Taste AnatomyTaste is a chemical sense. The sensory experience is produced by stimulation of specific receptors in the oral cavity.
Taste is mediated by 3 cranial nerves:
the facial (VII), glossopharyngeal (IX), and vagus (X), as displayed in the images below.
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D.) external image 79926-1412901-1948599-1985833tn.jpg E.)external image 79926-1412901-1948599-1989688tn.jpg

Diagram of the chorda tympani and relations to the petrosal nerves.
Relation of the chorda tympani to the ossicular chain in the middle ear.
Branches and relations of cranial nerve IX.
Diagram showing lingual innervation via cranial nerves VII, IX, and X.
Diagram illustrating the central and peripheral taste pathways.

Great explanations given below at link!!
Gross Anatomy: Peripheral Pathway

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The taste system has three types of taste papillae.
1. Fungiform- Located toward the front of the tongue. 3-5 Taste buds.
2. Circumvallate- Located at the back of the tongue and contains over 100 taste buds
3. Foliate- Located on the sides and grooves of the tongue and contains over 100 taste buds.
There is a fourth papillae called filiform, but it does not contain any taste buds
-Each taste bud has about 30-100 taste receptor cells which are long and thin and located perpendicularly on the surface of the tongue
-One end of the cell contains microvilli on it’s surface to increase contact with stimuli. The other end contains nerve fibers which give into the glossopharyngeal nerve, chorda tympani or vagal nerve

Taste Physiology